Trimming apparatus.



J. YANSS.

YTRIMMING APPARATUS.

3 SHEETSSHEET l.

A T TORIVE Y J. YANS S. TRIMMING APPARATUS.

APPLICATION FILED FEB. 9.1917.

Patented Nov. 20; 191?.

o; 3 NI m Lillitlfiilllitl? A U pnrrnn snare JACOB YANSS, OF NEW YORK, N. Y., ASSIGNOR 0F ONE-HALF TO FRANK N. ROEHRICH,

OF JERSEY CITY, NEVI JERSEY.

'IRIMIVIING APPARATUS.

Patented Nov. 20, 1917.

Application filed February 9, 1917. Serial No. 147,727.

T 0 all whom it may concern: 7

Be it known that I, JACOB YANSS, a citizen of the United States, and resident of the city of New York, in the county of Kings and State of New York, have invented certain new and useful Improvements in Trimming Apparatus, of which the following is a specification.

This invention relates to an apparatus for trimming surfaces of felt and analogous material, having reference, more especially, to an apparatus for trimming the raised marginal surfaces of blankets on the impression cylinders of printing presses whereby a uniform circumferential surface throughout the width of the blanket is obtaincd.

'lhe blanket of an impression cylinder soon becomes circumferentially depressed by the continuous action of the form on the paper which is imposed on the blanket, thus producing in the blanket, adjacent the nor' mal path of the paper, raised marginal surfaces which move at a higher speed than the intervening circumferential surface of the. blanket, and hence in the event of either longitudinal edge of the paper impinging upon the proximate raised surface the paper is deflected from its proper path and torn. It has been the general practice heretofore to remove the partially worn or depressed blanket from the impression cylinder as need may require, and replace it with a new blanket. This practice is an expensive one which my invention is designed to avoid by the provision of an apparatus of simple and efiicient construction whereby the raised surfaces of the blanket can be readily trimmed to the level of the depressed surface thereof without necessitating the removal of the blanket from the impression cylinder.

The invention, generally stated, comprises a portable apparatus having a rapidly rotating cutting element which can be conveniently maintained in operative relation to either raised surface of the blanket on the impression cylinder, and thus during the rotation of the cylinder effect the requisite trimming of the blanket material.

More specifically considered, the invention comprises, in a trimming apparatus, a suitable frame. bcaring rollers thereon, a rotary cutter operatively mounted on the frame, and a motor also mounted on the frame and operatively connected with thecutter; the

whole being adapted to be disposed with the rollers resting on the depressed surface'of the blanket andthe cutter engaging either raised surface of the material.

.I. he invention also comprises various features of construction and combinations of parts, all of which will be hereinafter described and claimed.

In the drawings Figure l is a side elevation of an apparatus embodying a preferred form of the invention.

F 2 is a plan thereof.

Fig. 2 is a sectional elevation showing the gage roller, the oscillatory supporting frame therefor, and adjuncts.

Fig. 3 is a longitudinal vertical section, as on the hue 33 of Fig. 2, the apparatus being represented as positioned on the circumfe-rentially depressed surface of the blanket on an impression cylinder.

Fig. 4 IS an elevation of the cutter end of the apparatus.

.Fig. 5 is a transverse vertical section through the apparatus and the adjacent blanket portion of an impression cylinder, as on the line 55 of Fig. 3.

Fig. 6 is a perspective view of a portion of the cylinder showing the action ofthe cutter upon a raised portion of the blanket. 'In this view is shown a supplemental filler for the gap between the adjacent edges of the blanket where they are attached to the body of the cylinder. 7 i

Figs. 7 and 8 show a plan and end view respectively of the filler.

Referring to the drawings IOdesignates a supporting structure comprising a skeleton body having at or near each end thereof spaced depending legs ll'in the lower portions of which are bearings for the spaced parallel shafts 12 of a pair of rollers 13. These rollers extend longitudinally of the structure and are adapted to beimposed upon the blanket 1 surrounding the impression cyllnder 15 of a printing machine so as to support the structure in a plane parallel to the axis of the cylinder, as will hereinafter appear.

Mounted in and between a pair of legs at one end of the structure, is an oscillatory frame comprising two spaced end members 16 pivotally connected to bracket lugs 17 on said legs and united by a bushing 18 extending parallel to theroller shafts 12. Ex-

all)

Baa:

tending through the bushing is a shaft 18 one end of which projects beyond the adjacent end of the supporting structure and bears a wheel 19 having cutting teeth across its periphery, the width of the wheel being preferably slightly greater than that of the raised surface of the material to be acted upon. The peripheral teeth are inclined or angularly disposed in reference to the axis of the wheel in order to insure an etficient shearing action of the teeth upon the felt during the rapid rotation of the wheel. The inner-end ofthe shaft is flexibly connected with the shaft 20 of a suitable electric m0- tor 21'which is preferably supported on a standard 22 on the structure whereby when the motor is energized the shaft 18 and its cutter are rotated at high velocity irrcspective of the position, within limits, of the oscillatory frame on its axis. Although any appropriate connection between the motor and cutter shaft may be employed, I prefer to employ mechanism of the character shown; that is to say, on the inner end of the cutter shaft 18 is a crank disk 23 which is connected by a series of spaced co responding'links 2% with a similar disk 25 on a short shaft 26 having its bearing in a bracket 27 depending from the supporting structure, and on this shaft 26 is a bevel wheel 28 in mesh with a similar wheel 29 on the motor shaft. By this construction the power is positively transmitted from the motor to the shaft 26 and thence through the crank disks and links to the cutter shaft, such disk and link connection permitting the vertical movement of the rotating cutter shaft without disturbing its parallelism to the axis of the cylinder.

Loosely mounted on the bushing is a roller 30 the diameter of which is equal to that of the cutter, 'eXteriorly of the teeth, whereby when the apparatus is applied to the depressed surface of the blanket of the rotating impression cylinder in such relation thereto that the rapidly revolving cutter overhangs and acts upon one of the raised marginal portions of the material, as 31, said roller is slightly above or beyond the depressed surface 32 of the blanket; but when such raised portion is adequately trimmed by the teeth of the rapidly rotating cutter, the roller 30, in virtue of the automatic downward movement of the frame in which the roller and cutter are mounted, contacts with the adjacent surface of the blanket and limits the descent of the cutter, thus serving as an efficient gage member to determine the depth of cut.

The standard 22 is preferably provided with spaced upward extensions 33 to which are affixed a pair of forwardly-proiecting handles 3st which facilitates the handling of the apparatus. By grasping these handles the apparatus can be readily applied to and held against the blanket of the impression cylinder with the cutter properly positioned to trim off either raised surface of the blanket, as desired.

I preferably arrange directly above the cutter a guard member 35 which not only protects the fingers of the user from accidental contact with the top of the cutter, but also prevents the severed material from scattering and flying upward. In the present instance this member comprises a plate, which overhangs the cutter, having decentling sides and ends adjacent the sides and periphery of the cutter respectively; a saddle 36 to which the plate is secured, and an endwise extending saddle supporting arm 37 affixed to the structure 10.

In order to close the usual slot or gap in the cylinder where the ends of the blanl-et are attached, and thus insure an uninterrupted circumferential bearing surface for the rollers 13 of the trimming apparatus during the rotation of the cylinder, 1 provide a supplemental filler which can be readily inserted in the gap. his filler comprises a strip 38 of rubber or the like, slightly tapering in cross-section, having secured to its under side, near its respective ends, cross-members 39 which when the filler is applied to the gap in the cylinder are adapted to take against the under sideof the cylinder rim and thus hold the filler securely in place.

From the foregoin it will be seen that my invention provides a portable self-contained apparatus which can be readily and conveniently applied to and operated on a cylinder blanket in a manner to accomplish the rapid trimming in succession of the raised marginal portions of the blanket, thereby securing a uniform surface throughout the circumference of the blanket wit11- out necessitating the removal of the blanket from the cylinder.

Various changes may be made in the apparatus above described without departing from the principle of the invention as do fined in the appended claims.

I claim- 1. An apparatus for trimming the raised marginal surfaces of felt and the like, comprising a frame having means for supporting it adjacent to the surface to be trimmed, an element on said frame having capacity for independent vertical movement, a cutter shaft in said element, a rotary cutter on said shaft having peripheral teeth for engaging and trimming the raised surface, a motor on said frame, operative connection between said motor and the cutter shaft, and means adjacent the cutter for contacting with the body or uncut surface of the material and thereby limiting the descent of the said element.

2. An apparatus for trimming the raised surfaces of felt and the like, comprising a frame having means for supporting it adjacent to the surface to be trimmed, an ele ment on said frame having capacity for independent vertical movement, a cutter shaft in said element, a rotary cutter on said shaft having peripheral teeth for engaging and trimming the raised surface, a motor on said frame, operative connection between said motor and the cutter shaft and a roller on said independently movable. element for limiting its descent.

3. An apparatus for trimming raised surfaces of felt and the like, comprising a frame having means for supporting it adjacent to the surface to be trimmed, an oscillatory member, including a bushing, on said frame,

a cutter shaft in said bushing, a cutter on said shaft having peripheral teeth for engaging and trimming the raised surface, a motor on said frame, and gearing, including a flexible connection, between said motor and the cutter shaft.

4. An apparatus for trimming raised surfaces of felt and the like, comprising a frame having means for supporting it adjacent to the surface to be trimmed, an oscillatory member on said frame, including a bushing, a cutter shaft in said bushing, a cutter on said shaft having peripheral teeth for engaging and trimming the raised surface, a motor on said frame, gearing, including a flexible connection, between said motor and e the cutter shaft, and a roller on' said bushing for limiting the descent of the oscillatory member.

5. An apparatus for trimming raised surfaces of felt and the like, comprising a frame having means for supporting it adjacent to the surface to be trimmed, an oscillatory member, including a bushing, on said frame, a cutter shaft in said bushing, a cutter on said shaft having peripheral teeth for engaging and trimmlng the raised surface, a motor on said frame, gearing, including a flexible connection, between said motorand the cutter shaft, a roller on said bushing for limiting the descent of the oscillatory member, and adjustable means for limiting the upward movement of said member.

6. In an apparatus for trimming the raised surfaces of impression roller blankets, a frame having pairs of spaced parallel supporting rollers adapted to be imposed upon the depressed surface of a blanket, an oscil porting rollers adapted a; be imposed WM 7 the depressed surface of a blanket, an oscillatory element, including a bushing, pivotally mounted on said frame, a cutter shaft in said bushing, a cutter on said shaft having inclined peripheral teeth for engaging a raised surface of the blanket, an electric motor on said frame, gearing, including a flexible connection, between said motor and the cutter shaft, and a. roller on said bushing corresponding in diameter with the cutter and adapted to contact with the depressed surface of the blanket when the raised surface has been trimmed.

8. A trimming apparatus including a supporting structure, a cutting element, and means for rotating said element, said structure adapted to be imposed on the depressed circumferential surface of the blanket of an impression cylinder with the cutting element in operative relation to a raised surface of the blanket, said cylinder including a cylindrical body having a longitudinal slot therein, a blanket on said body secured at its ends along the edges of the slot, and a filling strip of yielding substance detachably fitted within the space or gap between the ends of the blanket, whereby an uninterrupted bearing surface for the said sup porting structure is provided throughout the circumference of the impression cylinder.

Signed at New York city, in the county of New York and State of New York, this 8th day of February, A. D. 1917.

JACOB muss.

Copies of this patent may be obtained (or five cents each. by addressing the Commissioner of ?atents,

Washington, D. O. 

